Flowers trap serve not only to catch and consume prey in order to obtain nitrogenous substances, as in some carnivorous plants, but also to ensure cross-pollination!
In this case, the flowers have suffered a series of adaptive changes, designed to attract insects and especially to keep them.They have smelling nectar, visible colors, form a funnel endowed to end with a cap and inside piliferous which prevents exit, just like the devices in some mousetrap.
Such a plant is aristolechia clip, commonly found living near fences, in the meshes of the forest. It's flower, yellow or striped with red on some Mediterranean nations, has the form of a tube, dilated at the base, with one tongue at the top, visible from a distance.Aristolechia clip is visited by small insects that can sneak through funnel neck floral. Once entered, they can not get out because the two rows of stiff hairs turned down. Once caught, insect struggles inside the flower, download the pollen which they carry on stigmas, causing pollination. Shortly after fecundation occurs, brush which prevented the exit of Corola are softening, fading, and there is free path for insects to go out. The insects will fly to another flower, loaded with pollen from the stamens ,which meanwhile, maturing, will open their anthers.
On the same principle works with the trap of the fruits of the earth flower (Arum maculatum).
WONDER of Sumatra
In 1918, botanist Arnold, covering forests of Sumatra, was astonished in front of the plant strangers before. Under the crowns of Cissus - a tropical tree - shelter flowers as large a car wheel in diameter, with 5 live red juicy petals.
To the usual size and strange appearance of this plant to add another feature. The enormous flower emit a repulsive odor of the corpse. Attracted to the smell and color of petals, hundreds of flies thronging to it. No doubt that these insects contributed to pollination. In honor of the discoverer,to the flower was given its name Rafflesia Arnoldi. Although the world has been crossed far and wide, it has never found a flower that exceed the average size of the "miracle" of Sumatra: 1 m in diameter, 3 m in circumference and 9 kg in weight.
Flowers that trap insects are called Carnivorous plants. Their purpose in baiting traps for insects is to provide the plant with nourishment which is converted to energy. The plants also consume protozoa’s. They appear to grow in areas of thins social that lacks in nutrients. There are over 630 species of carnivorous plants. The plants trap insects, excrete digestive enzymes, and convert the insect to nourishment for the plant.
There are 5 basic types of carnivorous plants: Pitfall traps curl around its prey. Fly paper traps release a sticky substance called mucilage which grips its prey. Snap traps closed quickly preventing the escape of prey. Bladder traps suck in the prey. The lobster-pot entices the prey into an organ where it is consumed.